New Oil Filter Follow-Up

[doubleclutchinweasel]

Well, with the new filter in place, & a pan full of Rotella 15W40, the beast is happy.

This is hard to describe, but the oil pressure "acts" better. Oh, it still idles hot at 50 psi, & goes down the road at 75. But, on start-up, the pressure comes up "smoother" & stabilizes better. More of a feeling than anything I can explain. And, I think I know why.

The filter I took out of the canister was the wrong one! It was a P550750 filter. While physically the same basic size, it does not have the correct gaskets on the ends to seal properly in the can.

And, get this, it checks out as a bypass only filter, not the duplex filter it should be.

Some $&@! $#&^*#$& put the wrong part in there! No wonder it's happier now!

God, I hate people...

[theakerstwo]

In the early years when those filter were around I have seen many engine ruin with that filter trick.Your lucky if its not spung some brgs.

[Maddog13407]

didnt think they you could put the wrong one in. been a while since I had mine apart but isn't there an aluminum keeper housing that goes on top to hold the filter in place and seal it?

[doubleclutchinweasel]

In the early years when those filter were around I have seen many engine ruin with that filter trick.Your lucky if its not spung some brgs.

didnt think they you could put the wrong one in. been a while since I had mine apart but isn't there an aluminum keeper housing that goes on top to hold the filter in place and seal it?

Yep. Very lucky! Fortunately, the engine is running great. Oil pressure holds great. Glad I caught it in time. Probably because the engine does not work very hard...or very much.

The "wrong" filter was held down by the aluminum cap. But, the filter did not "seal" properly.

[39 Baby Mack]

That is why I've always been very particular about not calling these filters Luberfiners.

Some people get very confused with them.

Luberfiner=bypass filter.

Made for Mack(WGB)=full flow/bypass.

Ron

[doubleclutchinweasel]

That is why I've always been very particular about not calling these filters Luberfiners.

Some people get very confused with them.

Luberfiner=bypass filter.

Made for Mack(WGB)=full flow/bypass.

Ron

Excellent point. And, a point well taken. I BELIEVE the filter I took out was for a 750 Luberfiner.